The Heidelberg Catechism, first approved in 1563, is a confessional document of the Protestant movement considered one of the most ecumenical of the confessions. Published to coincide with the catechism's 450th anniversary, this book explores the Heidelberg Catechism in its historical setting and emphasizes the catechism's integration of Lutheran and Reformed traditions in all of its major doctrines. An appendix contains a translation of the Heidelberg Catechism recently prepared and adopted by three of the Reformed denominations that recognize the catechism as one of their confessions: the Presbyterian Church (U.S.A.), the Reformed Church in America, and the Christian Reformed Church in North America.